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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






2. 24 hours before end of estrus cycle






3. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






4. 1-2 days






5. Days which have decreasing daylight hours

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6. Superior genes are _______ to multiply






7. Why does estrus happen before ovulation?






8. 283 days






9. 4-6 days






10. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






11. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






12. 19-23 (21) days






13. Sperm is produced here






14. What about the sperm for a bull which has been castrated but still has testicles?






15. When are steers and heifers weaned from bottle feeding?






16. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






17. Animals which have many estrous periods per year (ex: cow - sow)






18. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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19. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






20. Urinary calculi.






21. Contains and regulates the temp of the testes for sperm production






22. 24 hours before end of estrus cycle






23. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






24. 10-37 (21) days






25. 30-38 hours after estrus cycle begins






26. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






27. 1-3 days






28. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






29. Scar tissue plugs up chambers of udder






30. To remove/separate testicles from animal's body before animal reaches puberty






31. Microscopic - make sure not sterile - very few bulls are actually tested






32. Allows extension of penis without fibro-elastic penis






33. 26 hours after estrus begins






34. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






35. 30 hours after estrus begins






36. Birthing process (termination of gestation)






37. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






38. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






39. Scar tissue plugs up chambers of udder






40. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






41. To remove/separate testicles from animal's body before animal reaches puberty






42. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






43. Milk is 15% ________ and 85% __________.






44. Why does estrus happen before ovulation?






45. Depository for semen during insemination. where urine leaves the body






46. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






47. What about the sperm for a bull which has been castrated but still has testicles?






48. Superior genes are _______ to multiply






49. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






50. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood